Best JavaScript code snippet using playwright-internal
renderer.js
Source:renderer.js  
...89  flushSyncCallbackQueue();90  return null;91  // before mutation é¶æ®µ92  // éç¹å¨ä¸é¢è¿ä¸ªå½æ°93  function commitBeforeMutationEffects(finishedWork){94    while (nextEffect !== null) {95      const current = nextEffect.alternate;96      if(!shouldFireAfterActiveInstanceBlur && focusedInstanceHandle !== null){97        // focus blurç¸å
³98      }99      const effectTag = nextEffect.effectTag100      // è°ç¨getSnapshotBeforeUpdate101      if((effectTag & Snapshot) !== NoEffect) {102        commitBeforeMutationEffectsOnFiber(current, nextEffect);103      }104      // è°ç¨useEffect105      if((effectTag & Passive) !== NoEffect) {106        if(!rootDoseHavePassiveEffects) {107          rootDoseHavePassiveEffects = true;...FiberWorkLoop.js
Source:FiberWorkLoop.js  
...363    NoFlags;364  if (subtreeHasEffects || rootHasEffect){365    const prevExecutionContext= executionContext;366    executionContext |= CommitContext;367    commitBeforeMutationEffects(finishedWork);368    commitMutationEffects(root, finishedWork);369    commitLayoutEffects(finishedWork, root, lanes);370    371    executionContext = prevExecutionContext;372  } 373  root.current = finishedWork;374  375  const rootDidHavePassiveEffects = rootDoesHavePassiveEffects;376  if (rootDoesHavePassiveEffects){377    rootDoesHavePassiveEffects = false;378    rootWithPendingPassiveEffects = root;379    pendingPassiveEffectsLanes = lanes;380  }381  ensureRootIsScheduled(root, performance.now())...env.js
Source:env.js  
1const fs = require('fs');2const path = require('path');3const paths = require('./paths');4// Make sure that including paths.js after env.js will read .env variables.5delete require.cache[require.resolve('./paths')];6const NODE_ENV = process.env.NODE_ENV;7if (!NODE_ENV) {8  throw new Error(9    'The NODE_ENV environment variable is required but was not specified.'10  );11}12// https://github.com/bkeepers/dotenv#what-other-env-files-can-i-use13const dotenvFiles = [14  `${paths.dotenv}.${NODE_ENV}.local`,15  `${paths.dotenv}.${NODE_ENV}`,16  // Don't include `.env.local` for `test` environment17  // since normally you expect tests to produce the same18  // results for everyone19  NODE_ENV !== 'test' && `${paths.dotenv}.local`,20  paths.dotenv,21].filter(Boolean);22// Load environment variables from .env* files. Suppress warnings using silent23// if this file is missing. dotenv will never modify any environment variables24// that have already been set.  Variable expansion is supported in .env files.25// https://github.com/motdotla/dotenv26// https://github.com/motdotla/dotenv-expand27dotenvFiles.forEach(dotenvFile => {28  if (fs.existsSync(dotenvFile)) {29    require('dotenv-expand')(30      require('dotenv').config({31        path: dotenvFile,32      })33    );34  }35});36// We support resolving modules according to `NODE_PATH`.37// This lets you use absolute paths in imports inside large monorepos:38// https://github.com/facebook/create-react-app/issues/253.39// It works similar to `NODE_PATH` in Node itself:40// https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders41// Note that unlike in Node, only *relative* paths from `NODE_PATH` are honored.42// Otherwise, we risk importing Node.js core modules into an app instead of webpack shims.43// https://github.com/facebook/create-react-app/issues/1023#issuecomment-26534442144// We also resolve them to make sure all tools using them work consistently.45const appDirectory = fs.realpathSync(process.cwd());46process.env.NODE_PATH = (process.env.NODE_PATH || '')47  .split(path.delimiter)48  .filter(folder => folder && !path.isAbsolute(folder))49  .map(folder => path.resolve(appDirectory, folder))50  .join(path.delimiter);51// Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be52// injected into the application via DefinePlugin in webpack configuration.53const REACT_APP = /^REACT_APP_/i;54function getClientEnvironment(publicUrl) {55  const raw = Object.keys(process.env)56    .filter(key => REACT_APP.test(key))57    .reduce(58      (env, key) => {59        env[key] = process.env[key];60        return env;61      },62      {63        // Useful for determining whether weâre running in production mode.64        // Most importantly, it switches React into the correct mode.65        NODE_ENV: process.env.NODE_ENV || 'development',66        // Useful for resolving the correct path to static assets in `public`.67        // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.68        // This should only be used as an escape hatch. Normally you would put69        // images into the `src` and `import` them in code to get their paths.70        PUBLIC_URL: publicUrl,71        // We support configuring the sockjs pathname during development.72        // These settings let a developer run multiple simultaneous projects.73        // They are used as the connection `hostname`, `pathname` and `port`74        // in webpackHotDevClient. They are used as the `sockHost`, `sockPath`75        // and `sockPort` options in webpack-dev-server.76        WDS_SOCKET_HOST: process.env.WDS_SOCKET_HOST,77        WDS_SOCKET_PATH: process.env.WDS_SOCKET_PATH,78        WDS_SOCKET_PORT: process.env.WDS_SOCKET_PORT,79      }80    );81  // Stringify all values so we can feed into webpack DefinePlugin82  const stringified = {83    'process.env': Object.keys(raw).reduce((env, key) => {84      env[key] = JSON.stringify(raw[key]);85      return env;86    }, {}),87    "__DEV__": false,88    "__PROFILE__": true,89    "__EXPERIMENTAL__": true,90    "__UMD__": true,91    __NEW_RECONCILER__: true,92    '__LOG_NAMES__': JSON.stringify([93      // 'createRoot',94      // 'ReactDOMRoot',95      // 'createRootImpl',96      // 'createContainer',97      // 'createFiberRoot',98      // 'createHostRootFiber',99      // 'createFiber',100      // 'FiberNode',101      // 'initializeUpdateQueue',102      // 'markContainerAsRoot',103      // 'listenToAllSupportedEvents',104      // 'jsx',105      'render',106      // 'updateContainer',107      // 'enqueueUpdate',108      // 'scheduleUpdateOnFiber',109      // 'ensureRootIsScheduled',110      // 'unstable_scheduleCallback',111      // 'requestHostCallback',112      // 'performWorkUntilDeadline',113      // 'flushWork',114      // 'workLoop',115      // 'performConcurrentWorkOnRoot',116      // 'flushPassiveEffects',117      // 'renderRootConcurrent',118      // 'prepareFreshStack',119      // 'createWorkInProgress',120      // 'createFiber',121      // 'FiberNode',122      // 'performUnitOfWork',123      // 'beginWork',124      // 'setInitialDOMProperties',125      // 'setInitialProperties',126      // 'diffProperties',127      // 'dispatchEvent',128      // 'mountIndeterminateComponent',129      // 'renderWithHooks',130      'useState',131      // 'mountState',132      // 'mountWorkInProgressHook',133      // 'updateHostRoot',134      // 'cloneUpdateQueue',135      // 'processUpdateQueue',136      // 'getStateFromUpdate',137      // 'reconcileChildren',138      // 'reconcileChildFibers',139      // 'reconcileChildrenArray',140      // 'createChild',141      // 'mountChildFibers',142      // 'createFiberFromElement',143      // 'createFiberFromTypeAndProps',144      // 'completeUnitOfWork',145      // 'completeWork',146      // 'commitRootImpl',147      // 'commitBeforeMutationEffects',148      // 'commitBeforeMutationEffectsImpl',149      // 'commitBeforeMutationLifeCycles',150      // 'clearContainer',151      // 'commitMutationEffectsImpl',152      // 'commitPlacement',153      // 'getHostParentFiber',154      // 'getHostSibling',155      // 'insertOrAppendPlacementNodeIntoContainer',156      // 'insertOrAppendPlacementNode',157      // 'trapClickOnNonInteractiveElement',158      // 'resetAfterCommit',159      // 'restoreSelection',160      // 'recursivelyCommitLayoutEffects',161      // 'ensureRootIsScheduled',162      // 'createInstance',163      // 'createElement',164      // 'updateFiberProps',165      // 'bubbleProperties',166      // 'dispatchDiscreteEvent',167      // 'createEventListenerWrapperWithPriority',168      'updateWorkInProgressHook'169    ]),170  };171  return { raw, stringified };172}...ReactFiberWorkLoop.js
Source:ReactFiberWorkLoop.js  
...125  if (firstEffect) {126    nextEffect = firstEffect;127    do {128      try {129        nextEffect = commitBeforeMutationEffects(nextEffect);130      } catch (e) {131        nextEffect = nextEffect.nextEffect;132      }133    } while (nextEffect)134    nextEffect = firstEffect;135    do {136      try {137        nextEffect = commitMutationEffects(root, nextEffect);138      } catch (e) {139        nextEffect = nextEffect.nextEffect;140      }141    } while (nextEffect)142  }143}...ReactFiberCommitWork.js
Source:ReactFiberCommitWork.js  
...3import {4  insertInContainerBefore,5  appendChildToContainer6} from 'reactDOM/ReactHostConfig';7export function commitBeforeMutationEffects(nextEffect) {8  while (nextEffect) {9    return nextEffect = null;10  }11}12function getHostParentFiber(fiber) {13  let parent = fiber.return;14  while (parent) {15    if (isHostParent(parent)) {16      return parent;17    }18    parent = parent.return;19  }20}21function isHostParent(parent) {...commits.js
Source:commits.js  
1function commitBeforeMutationEffects() {2  while (nextEffect !== null) {3      const effectTag = nextEffect.effectTag;4      if ((effectTag & Snapshot) !== NoEffect) {5          setCurrentDebugFiberInDEV(nextEffect);6          recordEffect();7          const current = nextEffect.alternate;8          commitBeforeMutationEffectOnFiber(current, nextEffect);9          resetCurrentDebugFiberInDEV();10      }11      if ((effectTag & Passive) !== NoEffect) {12          if (!rootDoesHavePassiveEffects) {13              rootDoesHavePassiveEffects = true;14              scheduleCallback(NormalPriority, () => {15                  flushPassiveEffects();...commitRoot.js
Source:commitRoot.js  
...17  let firstEffect = root.firstEffect18  if (firstEffect !== null) {19    console.log('has effect')20    nextEffect = firstEffect21    commitBeforeMutationEffects()22    nextEffect = firstEffect23    commitMutationEffects(root)24    nextEffect = firstEffect25    commitLayoutEffects(root)26  }27}28function commitBeforeMutationEffects() {29  console.log('function commit before mutation effects')30  while(nextEffect !== null) {31    nextEffect = nextEffect.nextEffect32  }33}34function commitMutationEffects(root) {35  console.log('function commit Mutation Effects')36  while(nextEffect !== null) {37    console.log(nextEffect.name)38    const flags = nextEffect.flags39    if (flags & ContentReset) {40      // éç½® text å
容41    }42    if (flags & Ref) {...commitRootImpl.js
Source:commitRootImpl.js  
1function commitRootImpl(root) {2  let firstEffect = null;3  nextEffect = firstEffect;4  do {5    commitBeforeMutationEffects();6  } while (nextEffect !== null);7  // mutation phase8  nextEffect = firstEffect;9  do {10    commitMutationeffects(root);11  } while (nextEffect !== null);12  // layout phase13}14function commitBeforeMutationEffects() {15  while (nextEffect !== null) {16    const current = nextEffect.alternate17    const flags = nextEffect.flags;18    if ((flags & Snapshot) !== NoFlags) {19      commitBeforeMutationEffectOnFiber(current, nextEffect);20    }21    if ((flags & Passive) !== NoFlags) {22      if (!rootDoesHavePassiveEffects) {23        rootDoesHavePassiveEffects = true24        scheduleCallback(() => {25          flushPassiveEffects()26        })27      }28    }...Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.commitBeforeMutationEffects();7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.commitBeforeMutationEffects();7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const context = await browser.newContext();13  const page = await context.newPage();14  await page.commitAfterMutationEffects();15  await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19  const browser = await chromium.launch();20  const context = await browser.newContext();21  const page = await context.newPage();22  await page.commitMutationEffects();23  await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27  const browser = await chromium.launch();28  const context = await browser.newContext();29  const page = await context.newPage();30  await page.commitMutationEffects();31  await browser.close();32})();33const { chromium } = require('playwright');34(async () => {35  const browser = await chromium.launch();36  const context = await browser.newContext();37  const page = await context.newPage();38  await page.commitMutationEffects();39  await browser.close();40})();41const { chromium } = require('playwright');42(async () => {43  const browser = await chromium.launch();44  const context = await browser.newContext();45  const page = await context.newPage();46  await page.commitMutationEffects();47  await browser.close();48})();Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.commitBeforeMutationEffects();7  await browser.close();8})();Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.commitBeforeMutationEffects();7  await page.screenshot({ path: 'example.png' });8  await browser.close();9})();10const { chromium } = require('playwright');11(async () => {12  const browser = await chromium.launch();13  const context = await browser.newContext();14  const page = await context.newPage();15  await page.evaluate(() => {16    document.querySelector('button').disabled = false;17  });18  await page.commitBeforeMutationEffects();19  await page.click('button');20  await browser.close();21})();Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.commitBeforeMutationEffects();6  await page.screenshot({ path: `screenshot.png` });7  await browser.close();8})();Using AI Code Generation
1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const page = await browser.newPage();5  await page.commitBeforeMutationEffects();6  await page.screenshot({ path: `google.png` });7  await browser.close();8})();9const { chromium } = require('playwright');10(async () => {11  const browser = await chromium.launch();12  const page = await browser.newPage();13  await page.commitAfterMutationEffects();14  await page.screenshot({ path: `google.png` });15  await browser.close();16})();17const { chromium } = require('playwright');18(async () => {19  const browser = await chromium.launch();20  const page = await browser.newPage();21  await page.commitMutationEffects();22  await page.screenshot({ path: `google.png` });23  await browser.close();24})();25const { chromium } = require('playwright');26(async () => {27  const browser = await chromium.launch();28  const page = await browser.newPage();29  await page.flush();30  await page.screenshot({ path: `google.png` });31  await browser.close();32})();33const { chromium } = require('playwright');34(async () => {35  const browser = await chromium.launch();36  const page = await browser.newPage();37  await page.flush();38  await page.screenshot({ path: `google.png` });39  await browser.close();40})();41const { chromium } = require('playwright');42(async () => {43  const browser = await chromium.launch();44  const page = await browser.newPage();45  await page.flush();46  await page.screenshot({ path: `google.png` });Using AI Code Generation
1const playwright = require('playwright');2(async () => {3  const browser = await playwright.chromium.launch();4  const page = await browser.newPage();5  await page.fill('input[name="q"]', 'Playwright');6  await page.commitBeforeMutationEffects();7  await page.click('input[name="btnK"]');8  await page.waitForLoadState('networkidle');9  await page.screenshot({ path: 'example.png' });10  await browser.close();11})();LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.
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